Answer:
They are similarly charged, which is why they repel each other.
Base pairs of DNA are A with T, and C with G
here's how to remember:
Apple - Tree
Car - Garage
- By changing three atom bond angle , we can change molecular polarity. if bond angle is 120° and all atom has same electronegativity, the resultant polarity ( dipole moment ) become zero. we can change bond anngle either less than or greater than 120°, but not exactly 120
- Replacing one or more atom with different atoms having electro negativity values also make molecular poles.
- By placing molecules under external electric field or magnetic field also causes to the molecule.
Scientists make hypothesis in order to make an educated guess on the outcome of the experiment.
For 23., you have to find a way to measure your heart rate not increase it. search it up on google.
